user
Explain why the given policy or measure is necessary.
Enforcing a wearing mask rule in public.

Response:
assistant
Enforcing a mask-wearing rule in public is essential to protect people from the spread of COVID-19. Wearing a mask is one of the best strategies to reduce the spread of the virus. It can reduce the risk of being infected and protect others by blocking droplet transmission. Mask-wearing reduces the transmission of aerosol particles and is a simple and effective way to limit the spread of the virus. Therefore, enforcing a mask-wearing rule in public is crucial to protect people and reduce the spread of the virus.